On Wed, 01 Sep 2021, Bjørn Mork wrote: > ifupdown has this extremely annoying misfeature that it forces a release > on shutdown, both for DHCP and DHCPv6. The automatic release on every This is *highly* desired *on IPv4*, wherever address pools are scarce. The correct thing would likely be: do not do it on IPv6, but still do it on IPv4. -- Henrique Holschuh